Binds to actin and affects the structure of the cytoskeleton. At high concentrations, profilin prevents the polymerization of actin, whereas it enhances it at low concentrations. By binding to PIP2, it inhibits the formation of IP3 and DG. Apis mellifera (taxid: 7460)
>sp|Q68HB4|PROF_BOMMO Profilin OS=Bombyx mori PE=2 SV=1
Binds to actin and affects the structure of the cytoskeleton. At high concentrations, profilin prevents the polymerization of actin, whereas it enhances it at low concentrations. By binding to PIP2, it inhibits the formation of IP3 and DG.
Binds to actin and affects the structure of the cytoskeleton. At high concentrations, profilin prevents the polymerization of actin, whereas it enhances it at low concentrations. By binding to PIP2, it inhibits the formation of IP3 and DG. This profilin is required for intercellular cytoplasm transport during Drosophila oogenesis.
Score = 97.1 bits (240), Expect = 3e-20, Method: Compositional matrix adjust.
Identities = 43/85 (50%), Positives = 64/85 (75%)
Query: 1 LSKDELGKLVQGFEKQDILTSSGVTLAGNRYIYLSGTDKVIRAKLGKVGVHCMKTQQAVV 60
LS+DE+ L + F K ++L ++G+ + G +YIYLSG DK+IR K + GVH +KT+ A+V
Sbjct: 38 LSQDEVATLARSFSKDEVLAANGIRIGGTKYIYLSGDDKLIRGKKDRQGVHIVKTKTAMV 97
Query: 61 ISLYEDPIQPQQAASVVEKLGDYLV 85
++LY +PI P+Q A VVEKLGD+L+
Sbjct: 98 MALYAEPILPEQCAVVVEKLGDWLI 122
Binds to actin and affects the structure of the cytoskeleton. At high concentrations, profilin prevents the polymerization of actin, whereas it enhances it at low concentrations. By binding to PIP2, it inhibits the formation of IP3 and DG.
Score = 72.0 bits (175), Expect = 9e-13, Method: Compositional matrix adjust.
Identities = 36/90 (40%), Positives = 54/90 (60%), Gaps = 1/90 (1%)
Query: 1 LSKDELGKLVQGFEKQDILTSSGVTLAGNRYIYLSGTD-KVIRAKLGKVGVHCMKTQQAV 59
+E+ +++ F++ L +G+ LAG +Y+ + G VIR K G G+ KT QA+
Sbjct: 44 FKPEEITNIMKDFDEPGFLAPTGLFLAGIKYMVIQGEPGAVIRGKKGSGGITIKKTNQAL 103
Query: 60 VISLYEDPIQPQQAASVVEKLGDYLVSCGY 89
+ LYE+P+ P Q VVEK+GDYLV GY
Sbjct: 104 IFGLYEEPVTPGQCNMVVEKIGDYLVDQGY 133
Binds to actin and affects the structure of the cytoskeleton. At high concentrations, profilin prevents the polymerization of actin, whereas it enhances it at low concentrations. By binding to PIP2, it inhibits the formation of IP3 and DG.
Binds to actin and affects the structure of the cytoskeleton. At high concentrations, profilin prevents the polymerization of actin, whereas it enhances it at low concentrations. By binding to PIP2, it inhibits the formation of IP3 and DG.
Score = 70.1 bits (170), Expect = 4e-12, Method: Compositional matrix adjust.
Identities = 35/90 (38%), Positives = 54/90 (60%), Gaps = 1/90 (1%)
Query: 1 LSKDELGKLVQGFEKQDILTSSGVTLAGNRYIYLSG-TDKVIRAKLGKVGVHCMKTQQAV 59
+E+ +++ F++ L +G+ LAG +Y+ + G VIR K G G+ KT QA+
Sbjct: 44 FKAEEITNIMKDFDEPGHLAPTGLFLAGTKYMVIQGEPGAVIRGKKGPGGITIKKTAQAL 103
Query: 60 VISLYEDPIQPQQAASVVEKLGDYLVSCGY 89
+ +YE+P+ P Q VVEK+GDYLV GY
Sbjct: 104 IFGVYEEPVTPGQCNMVVEKIGDYLVDQGY 133
Binds to actin and affects the structure of the cytoskeleton. At high concentrations, profilin prevents the polymerization of actin, whereas it enhances it at low concentrations. By binding to PIP2, it inhibits the formation of IP3 and DG.
Score = 69.7 bits (169), Expect = 4e-12, Method: Compositional matrix adjust.
Identities = 32/89 (35%), Positives = 56/89 (62%)
Query: 1 LSKDELGKLVQGFEKQDILTSSGVTLAGNRYIYLSGTDKVIRAKLGKVGVHCMKTQQAVV 60
L + E+ ++ +GF+ + L +SG+ + G +Y L D+ I K GV C++T+Q ++
Sbjct: 38 LQQPEITEIAKGFDSAEGLQTSGLHVQGQKYFLLRADDRSIYGKHEAEGVICVRTKQTIL 97
Query: 61 ISLYEDPIQPQQAASVVEKLGDYLVSCGY 89
I+ Y +QP +A ++VEKL DYL++ GY
Sbjct: 98 IAHYPSGVQPGEATTLVEKLADYLINVGY 126
Binds to actin and affects the structure of the cytoskeleton. At high concentrations, profilin prevents the polymerization of actin, whereas it enhances it at low concentrations. By binding to PIP2, it inhibits the formation of IP3 and DG.
Score = 69.3 bits (168), Expect = 7e-12, Method: Compositional matrix adjust.
Identities = 34/90 (37%), Positives = 53/90 (58%), Gaps = 1/90 (1%)
Query: 1 LSKDELGKLVQGFEKQDILTSSGVTLAGNRYIYLSG-TDKVIRAKLGKVGVHCMKTQQAV 59
+E+ +++ F++ L +G+ L G +Y+ + G VIR K G G+ KT QA+
Sbjct: 45 FKPEEITNIMKDFDEPGHLAPTGLFLGGAKYMVIQGEPGAVIRGKKGSGGITIKKTNQAL 104
Query: 60 VISLYEDPIQPQQAASVVEKLGDYLVSCGY 89
+ +YE+P+ P Q VVEK+GDYLV GY
Sbjct: 105 IFGIYEEPVTPGQCNMVVEKIGDYLVDQGY 134
Binds to actin and affects the structure of the cytoskeleton. At high concentrations, profilin prevents the polymerization of actin, whereas it enhances it at low concentrations. By binding to PIP2, it inhibits the formation of IP3 and DG.
Score = 68.9 bits (167), Expect = 8e-12, Method: Compositional matrix adjust.
Identities = 33/81 (40%), Positives = 48/81 (59%)
Query: 9 LVQGFEKQDILTSSGVTLAGNRYIYLSGTDKVIRAKLGKVGVHCMKTQQAVVISLYEDPI 68
L F D + +SG LAG Y+ L D+ I K G GV +KT +++++ +Y + I
Sbjct: 46 LASAFNNADPIRASGFDLAGVHYVTLRADDRSIYGKKGSAGVITVKTSKSILVGVYNEKI 105
Query: 69 QPQQAASVVEKLGDYLVSCGY 89
QP AA+VVEKL DYL+ G+
Sbjct: 106 QPGTAANVVEKLADYLIGQGF 126
Binds to actin and affects the structure of the cytoskeleton. At high concentrations, profilin prevents the polymerization of actin, whereas it enhances it at low concentrations. By binding to PIP2, it inhibits the formation of IP3 and DG.
Acanthamoeba castellanii (taxid: 5755)
Close Homologs in the Non-Redundant Database Detected by BLAST
Score = 100 bits (252), Expect = 2e-29
Identities = 43/89 (48%), Positives = 60/89 (67%)
Query: 1 LSKDELGKLVQGFEKQDILTSSGVTLAGNRYIYLSGTDKVIRAKLGKVGVHCMKTQQAVV 60
L+ +E+G LV GF+ D + S+G+TL G +Y+ + D+ I K G GV +KT+QA+V
Sbjct: 39 LTPEEVGTLVAGFKDPDGVFSTGLTLGGQKYMVIRADDRSIYGKKGAGGVVIVKTKQALV 98
Query: 61 ISLYEDPIQPQQAASVVEKLGDYLVSCGY 89
I +YE+ +QP QA VVEKL DYL S GY
Sbjct: 99 IGMYEEGVQPGQANKVVEKLADYLRSQGY 127
Profilin can inhibit actin polymerization into F-actin by binding to monomeric actin (G-actin) and terminal F-actin subunits, but - as a regulator of the cytoskeleton - it may also promote actin polymerization. It plays a role in the assembly of branched actin filament networks, by activating WASP via binding to WASP's proline rich domain. Profilin may link the cytoskeleton with major signalling pathways by interacting with components of the phosphatidylinositol cycle and Ras pathway. Length = 127
Profilin can inhibit actin polymerization into F-actin by binding to monomeric actin (G-actin) and terminal F-actin subunits, but - as a regulator of the cytoskeleton - it may also promote actin polymerization. It plays a role in the assembly of branched actin filament networks, by activating WASP via binding to WASP's proline rich domain. Profilin may link the cytoskeleton with major signalling pathways by interacting with components of the phosphatidylinositol cycle and Ras pathway.
>PF00235 Profilin: Profilin; InterPro: IPR002097 Profilin is a small eukaryotic protein that binds to monomeric actin (G-actin) in a 1:1 ratio thus preventing the polymerisation of actin into filaments (F-actin)
Probab=99.97 E-value=2.1e-30 Score=165.34 Aligned_cols=84 Identities=40% Similarity=0.706 Sum_probs=81.3
Q ss_pred CCHHHHHHHHhhcCCCccccccceEEcceEEEEEEecCcEEEEecCCceEEEEEcCceEEEEEeCCCCChhhHHHHHHHH
Q psy4809 1 LSKDELGKLVQGFEKQDILTSSGVTLAGNRYIYLSGTDKVIRAKLGKVGVHCMKTQQAVVISLYEDPIQPQQAASVVEKL 80 (89)
Q Consensus 1 ~s~~E~~~i~~~f~~~~~~~~~Gi~l~G~kY~~~r~d~~~i~~kkg~~G~~i~KT~~aiiIg~y~~~~~~~~~~~~ve~l 80 (89)
++|+|++.|++.|++|+.++.+||+|+|+||+++|.|++.+++|++++|++++||++++|||+|+++++|++|+++|++|
T Consensus 38 ~~~~E~~~i~~~f~~~~~~~~~gi~l~G~kY~~~~~d~~~i~~k~~~~G~~i~kt~~~ivIg~y~~~~~~~~~~~~v~~l 117 (121)
T PF00235_consen 38 ISPEEAKAIIKAFNNPSKFPSNGITLGGKKYIVLRADDNSIYGKKGKGGIIIVKTKQAIVIGMYDESIQPGNCNKAVEKL 117 (121)
T ss_dssp CSHHHHHHHHHHHHSSSHHHHH-EEETTEEEEEEEEETTEEEEEETTEEEEEEECSSEEEEEEEETTSTHHHHHHHHHHH
T ss_pred CCHHHHHHHHHHhcCchhcccCCeEEcCcEeEEEecCCceEEeeCCCCcEEEEECCCEEEEEEeCCCCCHHHHHHHHHHH
Confidence 58999999999999999999999999999999999999999999999999999999999999999999999999999999
Q ss_pred HHHH
Q psy4809 81 GDYL 84 (89)
Q Consensus 81 AdyL 84 (89)
||||
T Consensus 118 A~yL 121 (121)
T PF00235_consen 118 ADYL 121 (121)
T ss_dssp HHHH
T ss_pred HhhC
Confidence 9998
It can also in certain circumstance promote actin polymerisation. Profilin also binds to polyphosphoinositides such as PIP2. Overall sequence similarity among profilin from organisms which belong to different phyla (ranging from fungi to mammals) is low, but the N-terminal region is relatively well conserved. That region is thought to be involved in the binding to actin. A protein structurally similar to profilin is present in the genome of Variola virus and Vaccinia virus (gene A42R). Some of the proteins in this family are allergens. Allergies are hypersensitivity reactions of the immune system to specific substances called allergens (such as pollen, stings, drugs, or food) that, in most people, result in no symptoms. A nomenclature system has been established for antigens (allergens) that cause IgE-mediated atopic allergies in humans [WHO/IUIS Allergen Nomenclature Subcommittee King T.P., Hoffmann D., Loewenstein H., Marsh D.G., Platts-Mills T.A.E., Thomas W. Bull. World Health Organ. 72:797-806(1994)]. This nomenclature system is defined by a designation that is composed of the first three letters of the genus; a space; the first letter of the species name; a space and an arabic number. In the event that two species names have identical designations, they are discriminated from one another by adding one or more letters (as necessary) to each species designation. The allergens in this family include allergens with the following designations: Ara t 8, Bet v 2, Cyn d 12, Hel a 2, Mer a 1 and Phl p 11.; GO: 0003779 actin binding, 0007010 cytoskeleton organization, 0015629 actin cytoskeleton; PDB: 1ACF_A 3NEC_C 2V8F_B 2V8C_A 2VK3_A 2JKF_A 2JKG_A 1F2K_B 2ACG_A 1YPR_B ....
